motion control beam

RoadsterMND4900

Car model: Roadster
Model: NDERC/ND5RC
price:
Selling price$579.00

Product information

*It may not be possible to install it depending on the grade and year even if it is the same car model.Additionally, additional parts may be required for installation.Please be sure to check here for detailed compatibility.

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Reinforces the front and rear ends of the body to increase torsional rigidityBy suppressing body vibrations caused by high rigidity with an ultra-high damping friction damper, we create a ride that is both strong and supple and best on the street.Set of 2 front and rear>>More details

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Reinforces the end of the body to increase torsional rigidity
Motion control beam with built-in friction damper

The stronger the body, the better for the active enjoyment of driving.This is because input from the road surface distorts the body and hinders the movement of the suspension.Of course, the bodies of mass-produced cars have evolved year by year, and are now rigid enough for normal driving. There is a lot of room for increasing rigidity in order to fully enjoy the sense of unity withThat's why we have searched for weak points in mass-produced bodies and have built a lineup of products ranging from strut tower bars to full-fledged brace kits, aiming for the perfect rigid body.
Aiming for further depth, we focused on reinforcing the front and rear ends to help with body twisting.Compared to the cabin in the center of the body, where a monocoque is formed, the cabin is basically constructed with two square-shaped closed-section side frames laid out vertically, similar to the ladder frames used in trucks. , reinforcement is only provided.Moreover, there are parts of the suspension that are subject to heavy loads, so they are more likely to twist than the center of the body.If we can strengthen this area, we can create a stronger body.

We previously developed a product called frame end brace.Its structure is completely rigid by connecting the square shape with high-rigidity steel oval pipes.By combining with strut tower bars, floor cross bars, etc., we aim to significantly improve torsional rigidity.However, as the body approaches a perfectly rigid body, slight vibrations from the road surface that cannot be absorbed by the suspension, tires, and rubber bushing become more easily transmitted.This tendency is especially noticeable in the latest Mazda cars, which have higher body rigidity.
The motion control beam (MCB) *1 was developed to solve this problem.In order to suppress slight vibrations while increasing rigidity to the limit, the conventional steel oval shaft was replaced with an ultra-high damping friction damper.The inside has a simple mechanical configuration with disc springs and friction plates, as shown in "MCB internal structure (conceptual diagram)"

※1 MCB® is a registered trademark of Aisin Co., Ltd.
 

First, body rigidity is ensured by the tension of strong disc springs, which have a spring constant more than 100 times that of suspension springs.Vibration is suppressed by the elastic force and frictional force of the friction plate from the stroke range at the moment when the body is about to vibrate.The stroke amount is only about 4um (=0.004mm) in a scene where a driver who enjoys driving is driving through a winding road at a high pace (0.5G)Although it is a minute value that cannot be detected by measuring instruments, people recognize the difference as a difference in "ride taste".That is why we continue to focus on "sensitivity tuning" that does not appear in specifications.We are currently expanding our lineup with new items that offer strength and flexibility.I want you to experience the effect for yourself.

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